box heading images

[ramshacklejones]

I am attempting to remove the left and right images in the box headings (I want to keep the arrow and link), but all of my attempts leave a broken image. Mozilla will adjust the screen and make those images invisible, but in IE, they come up as broken images...

I think it's something in /includes/classes/boxes.php but I could be barking up the wrong tree as well. any help would be greatly appreciated...

...and I need help soon!

Thanks!